Stay-bolt.



E. I. DODDS.

STAY BOLT.

APPLICATION FILED SEPT. 21, 1912.

Patented Feb. 3, 1914.

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ETHAN I. DODDS, OF CENTRAL VALLEY, NEW YORK, ASSIGNOB, BY lViESNEASSIGN- MENTS, TO FLANNERY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.

STAY-BOLT.

Specification of Letters Patent.

Patented Feb. 3,1914.

Original application filed September 25, 1911, Serial No. 651,051.Divided and this application filed September To all whom, it mayconcern:

Be it known that I, Errmn I. Donns, a citizen of the United States,residing at Central Valley, in the county of Orange and State of NewYork, have invented certain new and useful Improvements in Stay-Bolts;and I do hereby declare the following to be a full, clear, andexactdescription of the invention, such as will enable others skilled inthe art to which it appertains to make and use the same.

This invention relates to flexible bolts such as are employed forconnecting the outside and inside plates of locomotive and otherboilers, and is a division of application Serial Number 651,051, filedSeptember 25th, 1911.

The object of the invention is to provide an improved stay bolt capableof a universal angular movement or yield, so that the staybolt. will berelieved of any vibration due to the expansion of the fire-box and crownsheets, and permitting the sheets to expand and contract at will.

Another object. of the invention is to provide a stay-bolt that canreadily be applied from the inside without. the trouble and expense ofdismantling the engine, and can be adjusted at any time, if necessary.

Another object is to so connect. all the .parts of the bolt and itsconnectors that the bolt can, after parts have been assembled, beapplied to both plates through an opening in one of the walls or platesof the boiler.

In the accompanying drawings, Figures 1.

2, 3, 4 and 5 are views part-1y in section and partly in elevationshowing several forms of couplings connecting the two sections of thebolt.

The several figures show bolts, each made up of parts so connected, thatafter they have been assembled, the bolt as a whole may be entered andsecured through a hole in one wall or plate of the boiler, and flexiblyconnect the two walls or plates of the boiler.

In Fig. l, I show a structure in which a solid shank 171 is at one endentered into a ball shaped socket 172 formed in a connector block 173attached to the wall 1 and is expanded therein by heating and driving itendwise against a ball 174 in said socket, until it forms a rocking fitwith the concave wall of the socket 172. The opposite end Serial No.721,675.

of the bolt shank has a hemispherical enlargement 17 5 provided with aseries of radial teeth which intermesh or cooperate with similar teethon the hemispherical head 176 of the connector 177 secured to the wall 2of the boiler. The two hemispherical heads are provided withintermeshing teeth or projections which permit of a semi-rotary andangular movement of each part relative to the other, and the heads areconnected, and held in intermeshing contact by the sleeve 178, intowhich they are entered and in which they are secured by swaging the endsof the sleeve down over the heads as shown.

Figs. 2, 3, 4 and 5 illustrate different ways of forming an intermediateuniversal joint connection between two bolt sections that are connectedat. their outer ends to the respective walls 1 and 2. In all 01 theseviews 236 and 237 represent the bolt sections which may be connected attheir outer ends to the walls 1 and 2, by the means illustrated or bythe sections preferably having a swiveled or ball and socket connectionas shown at 238.

In Fig. 2 the bolt sect-ions 236 and 237 are formed with the ball-heads239 that engage seats 240 formed in sleeve connection 241, this latterbeing internally threaded at its ends for the attachment of the washers242,

lar seats 243, to engage the ball heads 239 and lock them within theends of the connector 241. Both heads have lost motion connection withthe sleeve 241, to facilitate rotative movement in assembling, which consists of balls 244, engaging sockets 245, formed partly in the heads 239and partly in the sleeves, the sockets being larger than the balls so asto provide for the necessary flexibility between the sleeve and the boltsections.

In Fig. 3 a central swiveled joint is secured in a somewhat simplermanner, torming, in eiiect, half of the sleeve 241 of Fig. 2, integralwith the bolt section 236, giving it the form of a socketed head 246receiving the ball head 239 of the bolt section 237, said ball headbeing held within the socket by the washer 242 and locked, with capacityfor limited motion by the ball 244 and socket 245.

In Fig. 4 I show a construction in which that are likewise formed withconcave annuany other approved means, at least one of the bolt sections236 and 237 are formed with hemi-spherical heads 247 on their meetingends, the proximate ends of said heads being convex and formed withdiametric grooves or channels 2&8, that engage a pin 249 passed throughor surrounding sleeve 250. The heads are confined within the sleeve 250,by the washers 251, threaded into the outer ends of the sleeve andformed with seats 252 engaging the convex surfaces of the heads 247.

Fig. 5 shows a modification of Fig. 4 wherein the heads 253 of the boltsections 236 and 237 are formed on their proximate faces with radialteeth 254: that form a lost motion driving connection with anintermediate idler gear 255 disposed between the heads 253, the partsbeing confined by washers as in Fig. 4.

It is evident that many slight changes might be resorted to in therelative arrangement of parts shown and described without departing fromthe spirit and scope of my invention as set forth in the claims annexed.Hence I would have it understood that I do not wish to confine myself tothe exact construction and arrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. A stay bolt comprising a two part bolt, a coupling flexiblyconnecting the said parts of bolt, means for limiting the relativerotary movement of said bolt parts independently of each other, and auniversal joint connection between one section of the bolt and the wallto which it is attached.

2. A stay bolt comprising a two part bolt, a coupling for detachablyconnecting the two parts of the bolt and permitting relative rotarymovement thereof, and means within the coupling for limiting therelative rotary movement of said bolt parts independently or each other.

3. A stay bolt comprising a two part bolt, a coupling and meansdetachably connecting the two parts of the bolt and permitting relativerotary movement thereof, and means for limiting the relative rotarymovement of said bolt sections.

4. A stay bolt comprising two bolt sections, a coupling, means fordetachably connecting said coupling to the bolt heads and permittingrelative rotary movement thereof, and means within the coupling andengaging the bolt heads tor limiting the relative rotary movement ofsaid bolt sect-ions independently of each other.

5. A stay bolt comprising two bolt sections, a coupling, means fordetachably connecting said coupling to the bolt heads and permittingrelative rotary movement thereof, and means within and engaging thecoupling and bolt heads for limiting the relative rotary movement ofsaid bolt sections independently of each other.

6. A stay bolt comprising two bolt sections, a coupling embracing theheads of both bolt sections and permitting relative rotary movementthereof and a single means within the coupling and engaging both boltheads for limiting the relative rotary move ment of said bolt sectionsindependently of each other.

7. A stay bolt comprising two bolt sections, a coupling embracing theheads of both sections and permitting relative rotary movement thereof,means for detachably securing the bolt sections to the coupling and asingle means within the coupling and engaging both bolt heads forlimiting the relative rotary movement of said bolt sec tionsindependently of each other.

8. A stay bolt comprising two bolt sections, a coupling embracing theheads of both sections and permitting relative rotary movement thereof,means for detachably securing the bolt sections to the coupling and asingle means secured to the coupling and engaging both bolt heads forlimiting the relative rotary movement of said bolt sectionsindependently of each other.

9. In a stay bolt of the class described, a sleeve formed with a socketat each end and a pair of bolts formed with rounded heads looselyfitting into said sockets, one of said heads being formed with a notchand the other of said heads being formed with a projection fitting intosaid notch and each of said bolts being formed with retaining meanspositioned near the ends opposite said heads.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

ETHAN I. DODDS. Witnesses:

A. W. BRIGHT, Geo. F. DowNINe.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. G.

